Valve gear



Jan. 15, 1924.- 1,480,569

C. J. PILLIOD VALVE GEAR Filed Feb. l0. 1921 Patented Jan. 15, 1924.

UNITED STATES PATENT OFFICE. ,y

CHARLES J. PILLIOD, OF TOLEDO. OHIO, ASSIGNORTO D'AIEL SEARLES, TRUSTEE,

OIE TOLEDO, OHIO.

VALVE GEAR.

Application led February 10, 1921. Serial No.`443,742.

To all whom t may concern.

Be it known that l, CHARLES J. PiLLIoD, a citizen of the United States, and a resi dent of Toledo, in the county of Lucas and State of Ohio, have invented a certain new and useful Valve Grear;` and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use `the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this` specification. y

'This invention relates to reverse gears, and particularly to those of the radial type for use in connection with theengine valves of locomotives.

The primary object of my invention is to provide `a reverse mechanism construen tion which eliminates the use of the customary bell-crank-lever between the radius lever and the cross shaft of valve gears of the radial type, whereby to simplify, cheapen', lighten and otherwise improve on `the construction of such gears.

The inventionis fully described in the following specification, and while, in its `broader aspect, it is capable of embodiment in numerous forms, a preferred embodiment thereofl isillustrated in the accompanying drawings, in which,-

Figure 1 is a fragmentary side elevation of a locomotive equipped with my improved valve gear. Fig. 2 is a rear elevation of the reverse mechanism of the gear with parts in section and parts removed. Fig.

3 is a fragmentary plan view of the separate gears of the locomotive, and Fig. l is a side elevation of parts of the reverse mechanism of a gear in forward motion position.

Referring to the drawings, 1 designates ar locomotive frame, 2 the drive wheels thereof, 3 an engine cylinder, l the associated j cross-head operated from the piston in such cylinder, and 5 the valve stem cross-head guide for each engine.

The reverse mechanism for the valve gear,

one of which is located at each side of the locomotive, is carried by a frame part 6 mounted in suitable manner on the locomotive frame, and comprises a reverse-yoke 7, joiirnaled at the ends of its arms in the frame part 6 at 8, a radiiis-yoke 9 pivotally suspended from the upper end portion of The lower end of the` radius-lever 11 is connected by a union-rod 12 to the crosshead 4; to be operated by such cross-head,

theyoke '7, with its pivot at 10, and a l radius-lever 11, fulcrumed inthe lower vend po-rtion of the radius-'yoke 9.

opposite end of rthecross-shaft 11i has a rocker-arm 15 lixedly projecting downward therefrom and connected by a radius-rod 16 to the upper end of the combination-lever stem cross-head of the associated engine,

which cross-head works in the guide 5, as

well understood in the art.

The radius-lever 11 of the reversing mechanism at the opposite side of the locomotive to that above described is connected at its upper end to a rocker-arm 18, which projects rearward from a `cross-shaft 19 that extends through the yshaft 111:y and has at its opposite end a depending rocker-arm 2O in connection with the combination-lever 17 of the associated engine through a radius-rod 21.` The combination-lever 17 for each engine has its lower end connected by a union-link 22 with the associated crosshead 4. ItL is thus evident that the combination-lever 17 receives its valve accelerating movement through the reversing mechaj nism from one cross-head 1l, and receives its lap and lead movement through the link 22 from the other cross-head 4 at the other side of the locomotive.

rl`he reverse-yoke 7 of each gear is connected at its upper end by `a link 23 to a rocker-arm 24, one of which projects upward' from the respective end of a crossshaft 25 and the other of which projects upward from the respective end of a hollow cross-shaft 26 sleeved on the shaft 25, both shafts being suitably j ournaled in the frame. The shaft 25 has an arm 27 projecting upward therefrom and connected by a rod 28 to a suitable control means, and the hollow shaft 26 has a rocker arm 29 projecting downward therefrom and connected by a rod 3() to the control means. In Fig. 1

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the valve gearsarein neutral position and it is evidentthat a forward movement of the control rods 28 and 30 will impart Areverse rocking movements to the shafts 25 and 2G, thereby shifting one reverse yokey 7 of one gear forward and that of the other i gear rearward to place the respective gears in forward running position. For backward running an opposite movement is imparted to the control rods 28 and 80, thereby effecting a reversal of the movements of the v reverse yokes from that above stated. To obtain accelerated travel of the engine valves for either forward or reverse running, the `control means for the valve gears' is moved forwardv or backward, as the case may be and the accelerated mot-ion is then imj n a r.'

parted to the combination-levers 1( from the radius-levers 11 of the respective valve gears through the respective rocker-shaft and rocker-arm connections, which vin one case comprises the rocker-arm 13, shaft 14,

rocker-arm 15 and radius-rod 16, and inv thev other case comprises the roclier-arinl,

cross-shaft 19, rocker-arm 20 andl radius-rod- The lapfaiid lead movement of the coin-y nated.

lt is evident in the operation of av valve equipped with` my invention that the radiuslever 11 is rocked` by the reciprocatory move- I ments of the connected cross-head l-,fthe

rocking movements thereof being about both the radius-yoke pivot 10 and a pivotal connectionI 1211 of the radius lever therewith. Thev upper end of the radius-lever is connected to they respective cross-shaft of the gear and the more the reverse-yoke is shifted from neutral position the more will be `the accelerated movement imparted to the cross-shaft by the movement of the radius-lever.

I wish it understood that my invention is not limited to any specific construction, arrangement or form of the parts, as .it is capable' of numerous modifications and changes, without departing from the spirit of the claims.

Having thus described my invention what l claim as new, and desire to secure by Letters Patent, is,-

4 1. In a locomotive, the combination with an engine operated cross-head at each side and an engine valveat one'side, and a combinationv lever connected to the engine valve and having its lower end connected to one cross-head, of a radius lever connected to and driven by the other cross-head, a crossshaft,` a rocker-arm projecting from the cross-shafty and directly connectedfto the upper end of the radius lever, a second rocker-arm projecting from the shaft, and means connecting said second rocker-arm and the upper endl of the combination lever. 2. In a locomotive, a cross-head operated valve gear having ai radins-lever, a crosssliaft, a rocker-arm connecting thev crosssliaft and radius lever, a combi-nation leverhaving a, cross-head operated lap'and lead movement and` directly connected to the valve, and a connection between the crostsliaf't and upper end off the combination lever for communicating valve accelerating movements theretoA from radius lever actuating movements of the cross-shaft, and means for reversing the valveoperating motion. l

3. ln a locomotive, the combination with engine operated crossfheafdsat both sides and an engine valve at one side of the loeomotive, of a valve gear havinga combination-lever connected to the valveandy at one end to one cross-head, a cross-shaft havingrocker-arms projecting inv angular `relation therefrom, a link connection` between one rocher arm and the upper end` of the com;- bination-lever, a reverse-yoke mounted Vfor rocking movements, a radius-yoke swinging ly suspended from the reverse-yole, a radiuslever carried by the radius-yoke and having one end pivotally connected to the other rocker-arm of the cross-shaft and its other end connected to and operated by the crosshead at the opposite side of the locomotive to the engine valve.

.In testimony whereof, I have hereunto. signed my name to thisy specification.

CHARLES J. PILLIOD.

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